. >> time, energy, just life gets in the way. this year she set a goal. trying to get healthy and lose 10 pounds. >> thousands of people want the same thing. to motivate themselves they are adding a friendly wager thanks to a web site called diet bet. social weight loss platform that was developed to connect people who all share the common goal of trying to lose weight as well as the financial incentive to lose 4% of their body weight. >> erika organized. allows you to join a group that fits your wager level and time period. everybody pays in a certain amount and whoever loses that 4% within 4 weeks will split a pot. bets range from $5 all the way up to $300. erika's group is wagering $20. the more people who join, the bigger the pot. tony is a personal trainer. >> it's a great accountability system. he says he sets up challenges for his clients at the platinum gym. he asked if he'll recommend diet bet. >> when you have something to shoot for and a group of other people shooting for the same goal or heading in the same direction, that gets momentum. >> th